Spring bed-bottom



(No odel.)

D. L. CAMPBELL.

. SPRING. BED BOTTOM. r

. 252.42% Patented Jan.17,18 82.

r E I (m m. (mm. M \V' m a m m an) m UNITED STATES PATENT OFFICE.

DUDLEY L. CAMPBELL, or DENVER, ooLoRADo.

SPRING BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 252,425, dated January 17, 1882. Application filed December 10, 1881. (No model) 1' 0 all whom it may concern Be it known that I, DUDLEY L. CAMPBELL, a citizen of the United States, resident of Den- \'er,in the county of Arapahoe and State of Colorado, have inventeda new and valuable Improvement in Bed-Springs and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a plan View of my invention, and Fig. 2 is a perspective detail.

This invention has relation to spring bedhot-toms; and it consists in the construction and novel arrangement of the alternate twin springs and single springs lengthwise of the frame, thereby massing the supporting-spirals under the heaviest portions of the body.

The invention also consists in combining with the base-coil of the spring and its clamp ing-arm a wire fastening, all as hereinafter set forth, and especially pointed out in the claims appended.

In the accompanying drawings, the letter a designates the slats of the bed-bottom, which are arranged transversely. Commencing at either end of the frame, twin springs bare secured to the first and third slats lengthwise, as indicated in the drawings, the second slat being bridged. A row of twin springsis arranged inthis manner ateach end of the frame, and next thereto is arranged a row of single springs, c,'these being placed in line with the spaces between the twin springs. Next to the row of single springs is placed another row of twin springs, arranged lengthwise and bridgin g one of the slats, this row being succeeded by another row of single springs, and so on alternately until the bottom is full. This arrangement is designed to mass the supportingcoils under the hipsand shoulders or heaviest portions of the body, theconnectionsor bridges of the twin springs being under those portions where the bearing is not so great, so that the e tlect on the entire spring-bottom is to a great extent equalized. As the twin springs are ar ranged lengthwise, the parts of the bearingsurface which they compose are not connected transversely, and there will he no sagging or rolling when two persons of different weight occupy the same bed.

In order that the springs may be easily arranged and securtd in the desired manner, each spring is provided with a transverse arm, d, extending from the base-coil 6 under the shit, said arm having length sufficient to reach across the slat,'and a downwardly-bent end, g, projectingbeyond its edge, as indicated in the drawings. This end 9 is connected to the base-coil e by means of a wire, .2, which is looped around the coil and secured by twining its ends about the end g and twisting the secured to the slats without using screws, tacks,

or staples, and in case of a broken slat the springs can be removed and secured to a new slat quickly, and with but little trouble.

Having described this invention, what 'I claim, and desire to secure by Letters Patent, 1s-

1. The bed-bottom described, consisting of the rows ofsinglesprings c, and of twin springs 1), arranged lengthwise oftheframe, and alternately with said single springs, thereby massin g the supporting-spirals under the heaviest portions oftbe body, substantially as specified.

2. The combination, with the slate and the base-coil e of the spiral spring'thereon, of the clamping-arm d, extending under the slat and having a downwatdly-projecting end, g, and thelooped-wirefastening a, connecting said end to the base-coil, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the present-e of two witnesses.

DUDLEY L. CAMPBELL, 

